10.05.2013 - Cosmos of rev. Georges Lemaitre - premier projection of the film made of the lecture by rev. prof. Michael Heller at 13.09.2012 during the conference "Multicosmofun'12"17.05.2013 - Superenergy tensors and the stability of Einstein equations (prof. J. Garecki)24.05.2013 - Discussion about the definition of the luminosity distance in cosmology.